Simulation of superconducting resistive fault current limiter with magnetic field boosting using a shunt coil

Abstract

We have investigated via simulation the quench characteristics of resistive superconducting fault current limiters (SCRFCL) based on YBCO thick film deposited on YSZ substrate. The SCRFCL consists of meander-type YBCO strips with a strip width of 5 mm. The effect of changing the strip length and critical current density on the quenching behaviour has been investigated, initially for a SCRFCL without shunt impedance. To see the effects of connecting shunt impedance and of the application of an externally applied magnetic flux on the quenching behaviour, we have then considered the SCRFCL being shunted with a coil located inside the cryostat. The coil is orientated so that its flux passes through the SCRFCL in a direction perpendicular to the a-b plane. The shunt coil and magnetic flux directed from it are predicted to play an important role in reducing the problem of weak spots in the SCRFCL.

Publication Title

Proceedings of the Universities Power Engineering Conference

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